Termidor and Termidor SC are the same product, its just that no one ever says the SC part. SC stands for suspended concentrate. This is the same product the professionals use. The only difference is that licensed professionals can buy this product in larger bottles. Termidor is made in a larger 78 oz bottle, but it can only be sold to homeowners in the 20 oz bottle.
Termidor SC has approximately a 5 year shelf life when kept out of direct sunlight and out of extreme temperatures. However, once placed in the ground around a home, Termidor SC will last almost 10 years or longer.
When it comes to termites, you should never wait. Especially if you are worried about activity. The dryer the soil the better for Termidor SC. Termidor SC is made to bond to the soil, and the less moisture in the ground, the easier it is for it to take hold and provide long lasting protection. The only temperature that effects Termidor SC is when it is below freezing. Termidor SC should not be applied if the ground is below freezing, or it will not take hold. The 96 degrees will effect you, but not the Termidor SC. Drink LOTS of Water!
You should not apply Termidor SC if it is going to rain the same day. It is best to wait until you have a few days of no rain in the forecast so there is at least 24 - 36 hours time after you treat before it rains. Termidor SC is made to bond to the soil but it needs time to "set" and bond to hold up against a rain event.
It sounds like you have a detached garage if you can trench around 3 sides applying Termidor SC. If this is the case, you do not need to do any drilling inside the garage because the slab should be one solid pour, which means the only way termites could enter is from the outside perimeter. Also, you do not need to drill across the driveway where the door is either because there is nothing there to protect. There is no wood, just space where the door is. The only time you would drill across the front is if you had two single garage doors side by side with a center support. In that situation you would want to drill just a few holes on the inside near the support, and then outside near the support from the driveway to protect that area.
If your garage is attached to the house, then you would trench around the outside walls just like in the example above, except that you would only be trenching around 2 sides. The third side would be against the heated space of the house, where the door is to the house. You would need to drill this wall inside the garage because you would not be able to trench the other side of it.
We are always here to answer any questions you may have. Please feel free to call us at 866-581-7378 with any questions.